21 June 2012, 14:05

Rio+20 sustainability conference underway in Brazil

Rio+20 sustainability conference underway in Brazil
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The UN sustainability conference, the so-called Rio+20, is under way this week in Rio de Janeiro, Brazil, where 193 nations are meeting on sustainability in the same city where the international environmental meeting took place 20 years ago.

We have with us Brian Clark Howard, he’s the environmental writer and editor at National Geographic News.

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